/*
 * Copyright (2021) The Delta Lake Project Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.spark.sql.delta.fuzzer

/**
 * Trait representing execution observers that rely on phases with entry and exit barriers to
 * control the order of execution of the observed code paths. See [[ExecutionPhaseLock]].
 */
trait PhaseLockingExecutionObserver {

  val phaseLocks: Seq[ExecutionPhaseLock]

  /** Return `true` if we have left all phases, `false` otherwise. */
  def allPhasesHavePassed: Boolean = phaseLocks.forall(_.hasLeft)
}
